Alarm



A. N. PIERMAN.

ALARM.

(Application led Aug. 18, 1898.)

No. 620,958. Patented Mar. I4, |899.

(No Mndl.)

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, NITED STATES PATENT EFICE.

, ALEXANDER N. PIERMAN, OF BRIDGEPORT, CONNECTICUT.

ALARM.

SPCFCATN forming part Of Letters Patent NO. 620,958, date-d March 14,1899.

Application filed August 18, 1898. Serial No. 688,864. (No model.)

To @ZZ whom, t may con/067%:

Be it known that I, ALEXANDER N. PIER- MAN, a citizen of the UnitedStates, residing at Bridgeport, county of Fairfield, State ofConnecticut, have invented a new and useful Alarm, of which thefollowing is a specification.

My invention has for its object to provide a simple, inexpensive, easilyattached, and loud-sounding alarm adapted for general use, but moreespecially for vehicles, as bicycles; and my invention consists,essentially, in the combination, with a point or button carried by aresonant diaphragm, of a transverselycorrugated wheel Whose peripheryengages the point or button.

In the accompanying drawings, forming part of this specification, inwhich reference characters are used to designate the several parts,Figure lis an elevation illustrating the application of my novel alarmto a bicycle, the operative position being indicated by full lines andthe normal or inoperative position being indicated by dotted lines; Fig.2, a section on the line x m inFig. 1, and Fig. 3 a section on the liney y in Fig. 1.

It is a matter of no consequence, so far as the essence of my inventionis concerned, whether the alarm is applied t0 the front wheel or therear wheel or the special manner in whichgit isv applied. In the presentinstance I have shown it as applied to the front wheel and as attachedto the fork.

. A denotes my novel alarm as a Whole; B, a bracket by which it iscarried, and C the head; D, the front fork, and E the front wheel, of abicycle.

As before stated, an essential feature of m novel bicycle-alarm is aresonant diaphragm 1, which may be made of metal or of any suitablematerial and which carries at its center a hard point or button 2. Thisdiaphragm is rigidly secured in a case a, which may be made in anysuitable manner. In the present instance I have shown the case ascomprising plates 3 and 4t, which clamp the diaphragm firmly betweenthem and are secured together by rivets 5, the opening in the center ofthe case being of course large enough to permit ample vibration of thediaphragm.

6 denotes'a sound-opening in the case-in the presentinstance in the topat the centerover which a horn 7 may be placed when it is'desired tothrow the sound-Waves formed by the diaphragm in one general direction.

8 denotes an opening in the case-in the present instance in thebottom-through which the point or button 2 projects.

9 denotes ears formed integral with or 'rigidly secured to the case,between which is pivoted a Wheel 10, having a roughened or trans'-versely-corrugated surface which is engaged by the point or button andwhich wheel is adapted to be placed in engagement-with the bicycle-Wheeland receive motion therefrom.

The case and the other parts just described are shown as carried by alever 11, which is pivoted between ears 12 on bracket B, which is itselfprovided with clamps 14, by which it is secured to the fork, it being ofcourse apparent that the shape of the bracket and thel clamps are not ofthe essence of my invention, but may be adapted to any special use towhich it is contemplated placing the alarm.

A spring l5 of any suitable construction is arranged to normally throwthe alarm out of operative position ,as indicated by dotted lines inFig. 1.

16 denotes an operating device-as a cord, Wire, or rod-by which thealarm is thrown into operative position against the power. of

the spring. This operating device may be carried to any suitableposition, as the center of the'handle-bar or either of the grips.

When it is desired to sound the alarm, the operator-in the presentinstance the rider of the bicycle-by means of the operatingdevice,places the roughened wheel in engagement with thebicycle-vvheel. Theroughened wheel receives motion from the bicycle-Wheel, and thecorrugations of the wheel are engaged by the point or button carried bythe diaphragm, therebyimparting vibration to the diaphragm and producingthe alarm, which I find in practice will be heard at a much greaterdistance than bells and other alarms commonly in use. Having thusdescribed my invention, I

claim- 1. An alarm comprising a resonant diaphragm having at its centera hard point or button, a transversely corrugated or roughened wheeladapted to be engaged by thesaid point or button to produce vibration ofthe diaphragm, and a movable casein which said IOO diaphragm is mountedand With which said Wheel is connected so as to be movable With saidcase when the alarm is moved into or out of operative position.

2. An alarm comprising a resonant diaphragm having at its center a hardpoint or button, a transversely corrugated Wheel adapted to be engagedby the said point or button to produce vibration of the diaphragm, amovable case in which the diaphragm is inclosed and with which saidWheel is connected so as to be movable therewith, and means for placingthe alarm in operative position and for returning it to its normalposition.

3. The combination with a case having an opening G for the escape ofsound and an opening S, of a diaphragm rigidly secured Within the caseand having at its center a point or button which projects throughopening 8, a corrugated Wheel carried by the case and engaged by thepoint or button and means for placing the toothed Wheel in engagementwith a moving object, for example a bicycle-Wheel, whereby vibration ofthe diaphragm is produced and means for returning the parts to theirnormal position.

Il. The combination with a casehaving openings 6 and 8 and a lever byWhich it is carried, of a diaphragm secured within the case and carryinga point or button extending through one of the openings, a corrugatedWheel carried by the case and engaged by the point or button, a bracketto which the lever is pivoted and which is provided with means forattachment in place, an operating device as a cord by which the deviceis placed in operative position and a spring by which it is returned toits normal position.

5. The combination with a case havin g open ings 6 and 8 and a lever bywhich it is carried, of a diaphragm rigidly secured within the case andcarrying a point or button extending through one of the openings, acorrugated,

wheel carried by the case and engaged by the point or button, a hornsecured over the other opening, a bracket to which the lever is pivotedand means for throwing the alarm into and out of operative position.

In testimony whereof I aflix my signature in presence of two Witnesses.

ALEXANDER N. PIERMAN. Witnesses:

A. M. WoosTER, A. M. WITHERELL.

